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@@ -0,0 +1,522 @@
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+/*
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+ * osi.c - _OSI implementation
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+ *
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+ * Copyright (C) 2016 Intel Corporation
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+ * Author: Lv Zheng <lv.zheng@intel.com>
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+ *
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+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or (at
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+ * your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ *
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+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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+ */
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+
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+/* Uncomment next line to get verbose printout */
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+/* #define DEBUG */
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+#define pr_fmt(fmt) "ACPI: " fmt
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/acpi.h>
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+#include <linux/dmi.h>
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+
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+#include "internal.h"
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+
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+
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+#define OSI_STRING_LENGTH_MAX 64
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+#define OSI_STRING_ENTRIES_MAX 16
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+
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+struct acpi_osi_entry {
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+ char string[OSI_STRING_LENGTH_MAX];
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+ bool enable;
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+};
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+
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+static struct acpi_osi_config {
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+ u8 default_disabling;
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+ unsigned int linux_enable:1;
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+ unsigned int linux_dmi:1;
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+ unsigned int linux_cmdline:1;
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+ unsigned int darwin_enable:1;
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+ unsigned int darwin_dmi:1;
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+ unsigned int darwin_cmdline:1;
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+} osi_config;
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+
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+static struct acpi_osi_config osi_config;
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+static struct acpi_osi_entry
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+osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
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+ {"Module Device", true},
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+ {"Processor Device", true},
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+ {"3.0 _SCP Extensions", true},
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+ {"Processor Aggregator Device", true},
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+};
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+
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+static u32 acpi_osi_handler(acpi_string interface, u32 supported)
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+{
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+ if (!strcmp("Linux", interface)) {
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+ pr_notice_once(FW_BUG
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+ "BIOS _OSI(Linux) query %s%s\n",
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+ osi_config.linux_enable ? "honored" : "ignored",
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+ osi_config.linux_cmdline ? " via cmdline" :
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+ osi_config.linux_dmi ? " via DMI" : "");
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+ }
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+ if (!strcmp("Darwin", interface)) {
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+ pr_notice_once(
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+ "BIOS _OSI(Darwin) query %s%s\n",
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+ osi_config.darwin_enable ? "honored" : "ignored",
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+ osi_config.darwin_cmdline ? " via cmdline" :
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+ osi_config.darwin_dmi ? " via DMI" : "");
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+ }
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+
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+ return supported;
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+}
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+
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+void __init acpi_osi_setup(char *str)
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+{
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+ struct acpi_osi_entry *osi;
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+ bool enable = true;
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+ int i;
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+
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+ if (!acpi_gbl_create_osi_method)
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+ return;
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+
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+ if (str == NULL || *str == '\0') {
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+ pr_info("_OSI method disabled\n");
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+ acpi_gbl_create_osi_method = FALSE;
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+ return;
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+ }
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+
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+ if (*str == '!') {
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+ str++;
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+ if (*str == '\0') {
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+ /* Do not override acpi_osi=!* */
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+ if (!osi_config.default_disabling)
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+ osi_config.default_disabling =
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+ ACPI_DISABLE_ALL_VENDOR_STRINGS;
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+ return;
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+ } else if (*str == '*') {
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+ osi_config.default_disabling = ACPI_DISABLE_ALL_STRINGS;
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+ for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
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+ osi = &osi_setup_entries[i];
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+ osi->enable = false;
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+ }
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+ return;
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+ } else if (*str == '!') {
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+ osi_config.default_disabling = 0;
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+ return;
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+ }
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+ enable = false;
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+ }
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+
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+ for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
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+ osi = &osi_setup_entries[i];
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+ if (!strcmp(osi->string, str)) {
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+ osi->enable = enable;
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+ break;
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+ } else if (osi->string[0] == '\0') {
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+ osi->enable = enable;
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+ strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
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+ break;
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+ }
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+ }
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+}
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+
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+static void __init __acpi_osi_setup_darwin(bool enable)
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+{
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+ osi_config.darwin_enable = !!enable;
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+ if (enable) {
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+ acpi_osi_setup("!");
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+ acpi_osi_setup("Darwin");
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+ } else {
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+ acpi_osi_setup("!!");
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+ acpi_osi_setup("!Darwin");
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+ }
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+}
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+
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+static void __init acpi_osi_setup_darwin(bool enable)
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+{
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+ /* Override acpi_osi_dmi_blacklisted() */
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+ osi_config.darwin_dmi = 0;
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+ osi_config.darwin_cmdline = 1;
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+ __acpi_osi_setup_darwin(enable);
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+}
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+
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+/*
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+ * The story of _OSI(Linux)
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+ *
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+ * From pre-history through Linux-2.6.22, Linux responded TRUE upon a BIOS
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+ * OSI(Linux) query.
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+ *
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+ * Unfortunately, reference BIOS writers got wind of this and put
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+ * OSI(Linux) in their example code, quickly exposing this string as
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+ * ill-conceived and opening the door to an un-bounded number of BIOS
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+ * incompatibilities.
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+ *
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+ * For example, OSI(Linux) was used on resume to re-POST a video card on
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+ * one system, because Linux at that time could not do a speedy restore in
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+ * its native driver. But then upon gaining quick native restore
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+ * capability, Linux has no way to tell the BIOS to skip the time-consuming
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+ * POST -- putting Linux at a permanent performance disadvantage. On
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+ * another system, the BIOS writer used OSI(Linux) to infer native OS
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+ * support for IPMI! On other systems, OSI(Linux) simply got in the way of
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+ * Linux claiming to be compatible with other operating systems, exposing
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+ * BIOS issues such as skipped device initialization.
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+ *
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+ * So "Linux" turned out to be a really poor chose of OSI string, and from
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+ * Linux-2.6.23 onward we respond FALSE.
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+ *
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+ * BIOS writers should NOT query _OSI(Linux) on future systems. Linux will
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+ * complain on the console when it sees it, and return FALSE. To get Linux
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+ * to return TRUE for your system will require a kernel source update to
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+ * add a DMI entry, or boot with "acpi_osi=Linux"
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+ */
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+static void __init __acpi_osi_setup_linux(bool enable)
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+{
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+ osi_config.linux_enable = !!enable;
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+ if (enable)
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+ acpi_osi_setup("Linux");
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+ else
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+ acpi_osi_setup("!Linux");
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+}
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+
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+static void __init acpi_osi_setup_linux(bool enable)
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+{
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+ /* Override acpi_osi_dmi_blacklisted() */
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+ osi_config.linux_dmi = 0;
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+ osi_config.linux_cmdline = 1;
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+ __acpi_osi_setup_linux(enable);
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+}
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+
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+/*
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+ * Modify the list of "OS Interfaces" reported to BIOS via _OSI
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+ *
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+ * empty string disables _OSI
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+ * string starting with '!' disables that string
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+ * otherwise string is added to list, augmenting built-in strings
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+ */
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+static void __init acpi_osi_setup_late(void)
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+{
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+ struct acpi_osi_entry *osi;
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+ char *str;
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+ int i;
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+ acpi_status status;
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+
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+ if (osi_config.default_disabling) {
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+ status = acpi_update_interfaces(osi_config.default_disabling);
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+ if (ACPI_SUCCESS(status))
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+ pr_info("Disabled all _OSI OS vendors%s\n",
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+ osi_config.default_disabling ==
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+ ACPI_DISABLE_ALL_STRINGS ?
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+ " and feature groups" : "");
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+ }
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+
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+ for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
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+ osi = &osi_setup_entries[i];
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+ str = osi->string;
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+ if (*str == '\0')
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+ break;
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+ if (osi->enable) {
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+ status = acpi_install_interface(str);
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+ if (ACPI_SUCCESS(status))
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+ pr_info("Added _OSI(%s)\n", str);
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+ } else {
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+ status = acpi_remove_interface(str);
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+ if (ACPI_SUCCESS(status))
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+ pr_info("Deleted _OSI(%s)\n", str);
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+ }
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+ }
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+}
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+
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+static int __init osi_setup(char *str)
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+{
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+ if (str && !strcmp("Linux", str))
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+ acpi_osi_setup_linux(true);
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+ else if (str && !strcmp("!Linux", str))
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+ acpi_osi_setup_linux(false);
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+ else if (str && !strcmp("Darwin", str))
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+ acpi_osi_setup_darwin(true);
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+ else if (str && !strcmp("!Darwin", str))
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+ acpi_osi_setup_darwin(false);
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+ else
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+ acpi_osi_setup(str);
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+
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+ return 1;
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+}
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+__setup("acpi_osi=", osi_setup);
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+
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+bool acpi_osi_is_win8(void)
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+{
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+ return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
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+}
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+EXPORT_SYMBOL(acpi_osi_is_win8);
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+
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+static void __init acpi_osi_dmi_darwin(bool enable,
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+ const struct dmi_system_id *d)
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+{
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+ pr_notice("DMI detected to setup _OSI(\"Darwin\"): %s\n", d->ident);
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+ osi_config.darwin_dmi = 1;
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+ __acpi_osi_setup_darwin(enable);
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+}
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+
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+void __init acpi_osi_dmi_linux(bool enable, const struct dmi_system_id *d)
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+{
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+ pr_notice("DMI detected to setup _OSI(\"Linux\"): %s\n", d->ident);
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+ osi_config.linux_dmi = 1;
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+ __acpi_osi_setup_linux(enable);
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+}
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+
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+static int __init dmi_enable_osi_darwin(const struct dmi_system_id *d)
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+{
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+ acpi_osi_dmi_darwin(true, d);
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+
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+ return 0;
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+}
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+
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+static int __init dmi_enable_osi_linux(const struct dmi_system_id *d)
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+{
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+ acpi_osi_dmi_linux(true, d);
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+
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+ return 0;
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+}
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+
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+static int __init dmi_disable_osi_vista(const struct dmi_system_id *d)
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+{
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+ pr_notice("DMI detected: %s\n", d->ident);
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+ acpi_osi_setup("!Windows 2006");
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+ acpi_osi_setup("!Windows 2006 SP1");
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+ acpi_osi_setup("!Windows 2006 SP2");
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+
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+ return 0;
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+}
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+
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+static int __init dmi_disable_osi_win7(const struct dmi_system_id *d)
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+{
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+ pr_notice("DMI detected: %s\n", d->ident);
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+ acpi_osi_setup("!Windows 2009");
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+
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+ return 0;
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+}
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+
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+static int __init dmi_disable_osi_win8(const struct dmi_system_id *d)
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+{
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+ pr_notice("DMI detected: %s\n", d->ident);
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+ acpi_osi_setup("!Windows 2012");
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+
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+ return 0;
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+}
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+
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+/*
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+ * Linux default _OSI response behavior is determined by this DMI table.
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+ *
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+ * Note that _OSI("Linux")/_OSI("Darwin") determined here can be overridden
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+ * by acpi_osi=!Linux/acpi_osi=!Darwin command line options.
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+ */
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+static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
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+ {
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+ .callback = dmi_disable_osi_vista,
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+ .ident = "Fujitsu Siemens",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Mobile V5505"),
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+ },
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+ },
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+ {
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+ /*
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+ * There have a NVIF method in MSI GX723 DSDT need call by Nvidia
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+ * driver (e.g. nouveau) when user press brightness hotkey.
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+ * Currently, nouveau driver didn't do the job and it causes there
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+ * have a infinite while loop in DSDT when user press hotkey.
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+ * We add MSI GX723's dmi information to this table for workaround
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+ * this issue.
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+ * Will remove MSI GX723 from the table after nouveau grows support.
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+ */
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+ .callback = dmi_disable_osi_vista,
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+ .ident = "MSI GX723",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "GX723"),
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+ },
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+ },
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+ {
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+ .callback = dmi_disable_osi_vista,
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+ .ident = "Sony VGN-NS10J_S",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS10J_S"),
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+ },
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+ },
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+ {
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+ .callback = dmi_disable_osi_vista,
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+ .ident = "Sony VGN-SR290J",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR290J"),
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+ },
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+ },
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+ {
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+ .callback = dmi_disable_osi_vista,
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+ .ident = "VGN-NS50B_L",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NS50B_L"),
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+ },
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+ },
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+ {
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+ .callback = dmi_disable_osi_vista,
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+ .ident = "VGN-SR19XN",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR19XN"),
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+ },
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+ },
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+ {
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+ .callback = dmi_disable_osi_vista,
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+ .ident = "Toshiba Satellite L355",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
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+ DMI_MATCH(DMI_PRODUCT_VERSION, "Satellite L355"),
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+ },
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+ },
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+ {
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+ .callback = dmi_disable_osi_win7,
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+ .ident = "ASUS K50IJ",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
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+ DMI_MATCH(DMI_PRODUCT_NAME, "K50IJ"),
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+ },
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+ },
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+ {
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+ .callback = dmi_disable_osi_vista,
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+ .ident = "Toshiba P305D",
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+ .matches = {
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+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
|
|
|
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite P305D"),
|
|
|
+ },
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .callback = dmi_disable_osi_vista,
|
|
|
+ .ident = "Toshiba NB100",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
|
|
|
+ DMI_MATCH(DMI_PRODUCT_NAME, "NB100"),
|
|
|
+ },
|
|
|
+ },
|
|
|
+
|
|
|
+ /*
|
|
|
+ * The wireless hotkey does not work on those machines when
|
|
|
+ * returning true for _OSI("Windows 2012")
|
|
|
+ */
|
|
|
+ {
|
|
|
+ .callback = dmi_disable_osi_win8,
|
|
|
+ .ident = "Dell Inspiron 7737",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
|
+ DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7737"),
|
|
|
+ },
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .callback = dmi_disable_osi_win8,
|
|
|
+ .ident = "Dell Inspiron 7537",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
|
+ DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7537"),
|
|
|
+ },
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .callback = dmi_disable_osi_win8,
|
|
|
+ .ident = "Dell Inspiron 5437",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
|
+ DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5437"),
|
|
|
+ },
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .callback = dmi_disable_osi_win8,
|
|
|
+ .ident = "Dell Inspiron 3437",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
|
+ DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 3437"),
|
|
|
+ },
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .callback = dmi_disable_osi_win8,
|
|
|
+ .ident = "Dell Vostro 3446",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
|
+ DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3446"),
|
|
|
+ },
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .callback = dmi_disable_osi_win8,
|
|
|
+ .ident = "Dell Vostro 3546",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
|
|
|
+ DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3546"),
|
|
|
+ },
|
|
|
+ },
|
|
|
+
|
|
|
+ /*
|
|
|
+ * BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
|
|
|
+ * Linux ignores it, except for the machines enumerated below.
|
|
|
+ */
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Without this this EEEpc exports a non working WMI interface, with
|
|
|
+ * this it exports a working "good old" eeepc_laptop interface, fixing
|
|
|
+ * both brightness control, and rfkill not working.
|
|
|
+ */
|
|
|
+ {
|
|
|
+ .callback = dmi_enable_osi_linux,
|
|
|
+ .ident = "Asus EEE PC 1015PX",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
|
|
|
+ DMI_MATCH(DMI_PRODUCT_NAME, "1015PX"),
|
|
|
+ },
|
|
|
+ },
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Enable _OSI("Darwin") for all apple platforms.
|
|
|
+ */
|
|
|
+ {
|
|
|
+ .callback = dmi_enable_osi_darwin,
|
|
|
+ .ident = "Apple hardware",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
|
|
|
+ },
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .callback = dmi_enable_osi_darwin,
|
|
|
+ .ident = "Apple hardware",
|
|
|
+ .matches = {
|
|
|
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
|
|
|
+ },
|
|
|
+ },
|
|
|
+ {}
|
|
|
+};
|
|
|
+
|
|
|
+static __init void acpi_osi_dmi_blacklisted(void)
|
|
|
+{
|
|
|
+ dmi_check_system(acpi_osi_dmi_table);
|
|
|
+}
|
|
|
+
|
|
|
+int __init early_acpi_osi_init(void)
|
|
|
+{
|
|
|
+ acpi_osi_dmi_blacklisted();
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+int __init acpi_osi_init(void)
|
|
|
+{
|
|
|
+ acpi_install_interface_handler(acpi_osi_handler);
|
|
|
+ acpi_osi_setup_late();
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
Lv Zheng